SSC Sample Paper Mock Test-20 SSC CGL Tear-II Paper-1

  • question_answer
    The simplified value of \[{{[{{(0.111)}^{3}}+{{(0.222)}^{3}}-{{(0.333)}^{3}}+{{(0.333)}^{2}}(0.222)]}^{3}}\]is

    A) 0.999

    B)  0

    C)  0.888

    D)  0.111

    Correct Answer: B

    Solution :

    If \[a+b+c=0\] \[{{a}^{3}}+{{b}^{3}}+{{c}^{3}}=3abc\] Hence,  \[0.111+0.222+\,\,(-0.333)=0\] \[\therefore \] \[{{(0.111)}^{3}}+{{(0.222)}^{3}}+{{(-0.333)}^{3}}\] \[=-\,\,3\times 0.111\times 0.222\times 0.333\] \[=-\,\,{{(0.333)}^{2}}\times 0.222\] \[\therefore \] Given expression \[={{[-\,\,{{(0.333)}^{2}}\times 0.222+{{(0.333)}^{2}}\times 0.222]}^{3}}=0\]


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